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Glouglou · 06-12-2006, 08:58 PM

What is "pH crash?" Simply, this is when the buffers in your water are all used up and the pH of the water plummets. This is not good for the tank inhabitants or the biofilter. Many of the nitrifying bacteria are inactive at a pH below 6.0.

It happen to my tank and my Hagen KH test at this time show around 1 mg/l.

My Ph went to around 5 in matter of hours.
Liquid CaCo3 was administered, no fish loss.

I was working with Hagen CO2 system at that time, I, only in rare occasion manage to have around 20mg/l of CO2.

06-12-2006, 08:58 PM	#5 (permalink)
Glouglou Senior Member Join Date: Feb 2006 Location: Near New York border in Canada, close to Montreal Posts: 302 iTrader Ratings: 0 Plant Points: 19155	PH crash is not a mith. What is "pH crash?" Simply, this is when the buffers in your water are all used up and the pH of the water plummets. This is not good for the tank inhabitants or the biofilter. Many of the nitrifying bacteria are inactive at a pH below 6.0. It happen to my tank and my Hagen KH test at this time show around 1 mg/l. My Ph went to around 5 in matter of hours. Liquid CaCo3 was administered, no fish loss. I was working with Hagen CO2 system at that time, I, only in rare occasion manage to have around 20mg/l of CO2. Last edited by Glouglou : 06-13-2006 at 04:33 PM.